single

a.单一的；单人的 n.单程票

simultaneously, simultaneousness, simul-taneity, sin, since, sincere, sincerely, sincerity, sine, sine die, sine qua non, sinecure, sinew, sinewy, sinful, sinfully, sing, Singapore, singe, singer, singing, single out, single-minded, singlet, singsong, singular, singularity, singularly, sinister, sink, sink in, sinker, sinkhole, sinking, sinking fund, sinlessness, sinner, Sino- (also sino-), sinologist, sinology, sinuosity,